Intestinal duplication in a miniature Schnauzer dog.

A 9-week-old miniature Schnauzer dog was brought to a veterinary clinic because of an acute onset of vomiting. A 2 to 3-centimeter, round, firm structure in the mid-abdomen was palpated with a repeatable pain response. An exploratory laparotomy revealed a grossly cystic-appearing mass on the distal ileum. Resection and anastomosis were conducted. The histopathology report concluded the structure was an intestinal duplication, a rare congenital abnormality, with the structure sharing an outer muscular layer with the normal intestine. The resection was considered completely excised. The puppy recovered well and was clinically normal on follow-up examinations. The findings from this case suggest congenital abnormalities should always be included on a differential diagnosis list for all young animals, regardless of the presenting complaint.